Riwbox Bluetooth Headphones Wireless Sport Stereo In-Ear Noise Cancelling Sweatproof Headset with Microphone for iPhone 6s Plus Samsung Galaxy S6 S5 and Android Phones -- Black True Riwbox Tech --- Our Riwbox bluetooth headphones defines elegance and functionality, and are equipped with bluetooth 4.0 + EDL in headphones 60% than the wireless competition + CVC 6.2 intelligent noise cancelling Pure Sound In-ear --- With functional user interface, ergonomic earbuds design, sweat-proof, and a 12-meter working distance, our bluetooth headphones offering hours of pure enjoyment through a variety of activities. Universal Device Compatibility --- Riwbox headphones are compatible with most bluetooth-enabled devices & apps. An innovative one-to-two technology allowing the headphones to connect two devices at the same time. Simple-to-use --- Control all functions of music (volume, sound, song selection) and calls the last dial number from phone on the headphones directly. Up to 5 hours of talk / playing time and 147 hours standby time Package contents: Riwbox kinetic series wireless headphones, user manual, charging cable, and custom earbuds